Pump-cylinder.



' D. F. AXELSON.A

PUMP CYLINDER.

APPLICATION FILED ofc. 5 uns Patented July 2, 19h18.

STATES PATENT OFFICE..

DELBEBT F. AXEISON, OF LOS ANGELES, CALIFORNIA, ASSIGNOB rT0 AXELSON MACHINE C0., A COPABTNERSHIP COMPRISING C. F. AXELSON AND G. A. AXELSON.

PUMP-CYLINDER.

Specification of Letters Patent.

Patented July V2, 1918.

Application led December 5, 1916. Serial No. 135,262.

To all lwhom, it mag/concern.'

Be it known that I, DELBERT F. AxELsoN, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented a new and useful Pump-Cylinder, of which the following is a specification.

My invention relates to oil well apparatus,

and -particularly to the pumps which are placed in the bottom of an oil well and which are actuated through a suitable string of pump rods for the purpose of raising the oil to the surface of the ground.

The principal object of my invention is to produce certain improvements and refinements in such pumps, and to provide a novel method of producing same.

More particularly, my invention relates to the liners which are used in such pumps, and a further object of the invention is t produce a novel ,form of liner which can be produced in-quantities and which will be absolutely interchangeable.

Further objects and yadvantages will be referred to and described more particularly hereinafter.

Referring to the drawings, which are for illustrative purposes only: f

Figure 1 is an application gure, be' an elevation of a iportion of an oil we with a pump embo ying my invention installed therein.

Fig; 2 is a vertical cross section von an enlarged scale of a illustrated in'Fig. i

Fig. 3 is a section onV a plane represented by the line 3-3, Fig. 2.

In the embodiment of my invention shown in the drawings, an oil well 11 is shown which terminates at the surface of the ground 12, upon whichis placed a derrick 13 containing any standard form of pumping apparatus. The well 11 may be lined with calsin i through itu ing 15. 'Threadedon the'lower end of the tubing 15 is an upper collar 16. This collar is provided` with. a central opening 17 which is connected by means of a finished shoulder 18 with a liner seat`19. The liner seat 19 connects through a shoulder 20 and a illet 21 with a threaded 4 opening 22 in which a shell 23 is secured.

portion of the apparatus 14, and the oil may be raised diameter as the lseat 19, this diameter being practically the same as the external diameter of the liners 30. The liners abut against each other and are solidly clamped between the seats 19 when the collars 24 and 16 are screwed together on the shell 23.

In the practical production of my invention, I first accurately ream the shell 23 and the seats 19 to a predetermined diameter. I then grind the liners 30 \to a smaller predetermined diameter, this diameter being suitable for the reception of a plunger 40 which is actuated through a suitable string of pump rods 41. The liner 30 is then placed lon a mandrel and the exterior of the rin s 32 is accurately ground so that they w1ll slide inside the shell 23 and fit in'the seats 19. By the use of my invention the liners 30 vmay vbe made in quantities of a definite of may be made at any time by an ignorant or unskilled person wlth the assurance that they will operate properly. The liners 3'0 are rounded oi, as shown at 51, so that sharp cutting edges will not be left to cut into the plungers asthey are inserted or withdrawn.

I Iclaim as' my invention:

1. In an oil well pump, a shell; an upper collar into which said shell is threaded; a lower collar into which said shell is threaded; (and a series of liners, each liner fitting accurately inside said fshell and having a central opening truly concentric with its outside diameter, said liners being seated at either end in said collarsand being tightly clamped to ether between said collars.

2. A com ination as in claim 1 in which the periphery of the liner consists of a series of accurately ground rings.

In testimony whereof, I have hereuntoy set my hand at Los Angeles, California, this 20th day of November, 1916.

' DELBERT F. AXELSON. 

